News & Events

Department Events & Announcements

Events

• Jan

  31

  CS Seminar: Why AI Needs Social Choice (Daniel Halpern)

  Department of Computer Science (CS)

  12:00 PM 3514, Mudd Hall ( formerly Seeley G. Mudd Library)

  EVENT DETAILS

  Friday / CS Seminar
  January 31st / 12:00 PM
  Hybrid / Mudd 3514

  Speaker
  Daniel Halpern, Harvard University
  

  Talk Title
  Why AI Needs Social Choice

  Abstract
  In many modern AI paradigms, we encounter tasks reminiscent of social choice theory: collecting preferences from individuals and aggregating them into a single joint outcome. However, these tasks differ from traditional frameworks in two key ways: the space of possible outcomes is so enormous that we can only hope to collect sparse inputs from each participant, and the outcomes themselves are often highly complex. This talk explores these challenges through two case studies: Polis, a platform for democratic deliberation (https://arxiv.org/abs/2211.15608), and Reinforcement Learning From Human Feedback (RLHF), a method for fine-tuning LLMs to align with societal preferences (https://arxiv.org/pdf/2405.14758). In both cases, the focus is on evaluating existing methods through an axiomatic lens and designing new methods with provable guarantees.

  Biography
  Daniel Halpern is a final-year PhD student at Harvard University advised by Ariel Procaccia. He is supported by an NSF Graduate Research Fellowship and a Siebel Scholarship. His research broadly sits at the intersection of algorithms, economics, and artificial intelligence. Specifically, he considers novel settings where groups of people need to make collective decisions, such as summarizing population views on large-scale opinion aggregation websites, using participant data to fine-tune large language models, and selecting panel members for citizens’ assemblies. In each, he develops practical and provably fair solutions to aggregate individual preferences.

  ---
  Zoom: https://northwestern.zoom.us/j/96824870974?pwd=QfxpsRpfWcDlx4TXPswbAd8X4Dqhyb.1
  Panopto: https://northwestern.hosted.panopto.com/Panopto/Pages/Viewer.aspx?id=2159520b-1d46-4ece-ba17-b268017475c6
  Community Connections Topic: Being comfortable with being uncomfortable

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  TIME Friday, January 31, 2025 at 12:00 PM - 1:00 PM

  LOCATION 3514, Mudd Hall ( formerly Seeley G. Mudd Library)    map it

  ADD TO CALENDAR

  CONTACT Wynante R Charles    wynante.charles@northwestern.edu EMAIL

  CALENDAR Department of Computer Science (CS)

• Aug

  20

  Alumni Education Webinar: McCormick School of Engineering's Strategic Vision

  McCormick School of Engineering and Applied Science

  12:00 PM

  EVENT DETAILS

  Join us to explore the McCormick School of Engineering’s strategic vision and its vital role in advancing Northwestern’s top priorities. From groundbreaking research to transformative education, Northwestern Engineering is shaping solutions to the world’s most pressing challenges and working to advance Northwestern. During this presentation, you will learn directly from Dean Christopher Schuh on how our alumni community can come together to amplify this impact—through engagement, mentorship, philanthropy, and industry connections. Learn how your involvement can help unlock bold ideas and ensure Northwestern remains a global leader in engineering and beyond.

  Event Contact Info

  NAA Alumni Education
  alumnieducation@northwestern.edu

  Register Now

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  TIME Wednesday, August 20, 2025 at 12:00 PM - 1:00 PM

  ADD TO CALENDAR

  CONTACT Andi Joppie    andi.joppie@northwestern.edu EMAIL

  CALENDAR McCormick School of Engineering and Applied Science

• Sep

  8

  Welcome & Breakfast for New McCormick PhD Students

  McCormick School of Engineering and Applied Science

  9:00 AM LR2 & Tech East Plaza, Technological Institute

  EVENT DETAILS

  Enjoy a welcome from Dean Christopher A. Schuh and other McCormick leaders, and receive a Northwestern Engineering T-shirt. A free light breakfast on the Tech East Plaza will follow.

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  TIME Monday, September 8, 2025 at 9:00 AM - 10:00 AM

  LOCATION LR2 & Tech East Plaza, Technological Institute    map it

  ADD TO CALENDAR

  CONTACT Andi Joppie    andi.joppie@northwestern.edu EMAIL

  CALENDAR McCormick School of Engineering and Applied Science

• Sep

  12

  New Undergraduate Fall 2025 Registration

  University Academic Calendar

  All Day

  EVENT DETAILS

  New Undergraduate Fall 2025 Registration

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  TIME Friday, September 12, 2025

  ADD TO CALENDAR

  CONTACT Office of the Registrar    nu-registrar@northwestern.edu EMAIL

  CALENDAR University Academic Calendar

• Sep

  15

  Welcome & Luncheon for New Full-time Graduate Students

  McCormick School of Engineering and Applied Science

  11:00 AM Ryan Auditorium & Tech East Plaza, Technological Institute

  EVENT DETAILS

  Enjoy a welcome from Dean Christopher A. Schuh and other McCormick leaders, and receive a Northwestern Engineering T-shirt. A free lunch on the Tech East Plaza will follow.

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  TIME Monday, September 15, 2025 at 11:00 AM - 12:30 PM

  LOCATION Ryan Auditorium & Tech East Plaza, Technological Institute    map it

  ADD TO CALENDAR

  CONTACT Andi Joppie    andi.joppie@northwestern.edu EMAIL

  CALENDAR McCormick School of Engineering and Applied Science

• Sep

  16

  Fall Classes Begin. Change of Registration (Drop/Add) Late registration for returning students begins

  University Academic Calendar

  All Day

  EVENT DETAILS

  Fall Classes Begin. Change of Registration (Drop/Add) Late registration for returning students begins

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  TIME Tuesday, September 16, 2025

  ADD TO CALENDAR

  CONTACT Office of the Registrar    nu-registrar@northwestern.edu EMAIL

  CALENDAR University Academic Calendar

• Sep

  25

  Bagel Thursday

  Department of Computer Science (CS)

  9:00 AM

  EVENT DETAILS

  TBA

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  TIME Thursday, September 25, 2025 at 9:00 AM - 11:00 AM

  ADD TO CALENDAR

  CONTACT Wynante R Charles    wynante.charles@northwestern.edu EMAIL

  CALENDAR Department of Computer Science (CS)